Flask for sand molds.



J. D. MILLER.

FLASK FOB SAND HOLDS.

APPLIoATmN FILED 330.4, 1908. V

Patented Nov.- 9, 1909..

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mm on. mmmmwmudow a g J. D. MILLAR.

FLASK FOR SAND MOLDS.

APPLICATION FILED 13110.4, 1908.

Patented MM), 1909.

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msrrnn STATES PATENT OFFICE.

JAMES D. MILLAR, OF IVfILWAUKEE, WISCONSIN.

FLASK FOR SAND MOLDS.

To all whom it may concern:

Be it known that 1, JAMES D. MILLAR, residing in Milwaukee, in the county of Milwaukee and State of lVisconsin, have invented new and useful Improvements in Flasks for Sand Molds, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This invention relates to improvements in flasks for sand molds and more particularly to that class of flasks in which means are provided for supporting the sand within the cope member of the flask.

One of the objects of this invention is to provide a flask with pivoted sand supporting members which may be swung out of operative position when it is desired to remove the flask from the sand in order to substitute a slip flask therefor, whereby a number of molds may be made from the same flask without the necessity of having a separate flask for each mold.

VVit-h the above and other objects in view, the invention consists of the mold and its parts, and all equivalents thereof, as hereinafter set forth.

In the accompanying drawings in which the same reference characters indicate the same parts in the several views: Figure l is a plan view of the complete flask embodying the improvement; Fig. 2 is a transverse vertical sectional view thereof; Fig. 3 is a side view thereof; Fig. 4 is an inverted plan view of a fragment of the cope member of the flask with one of the sand supporting members swung out of operative position; and Fig. 5 is a transverse vertical sectional view of the slip flask used in protecting the sand mold after the molding flask has been removed therefrom.

Referring to the drawings, the numeral 6 indicates a circular two-part flask comprising a cope member or section 7 and a. drag member or section 8. These members are used jointly in forming the impression in the sand and when the mold is completed the flask members are removed and the slip flask 9 substituted in lieu thereof thus obviating the necessity of having a large number of molding flasks in the foundry.

The drag member of the flask is constructed of structural flat metal cut and shaped to form a circular tapering member reinforced with angle and bar metal pieces riveted to the top and bottom edges, respectively, there- Specification of Letters Patent.

Application filed December 4, 1908.

Patented Nov. 9, 1909.

Serial No. 465,993.

of. The cope member is also tapering and formed of structural flat metal reinforced with a bar riveted to its top edge and with an angle piece 10 riveted to the structural metal a slight distance above its lower edge. The cope member is adapted to rest upon the drag member in molding and the two members are held in alined position by means of the angled plates 12 provided with upstanding pins 13 which engage the apertured angled plates lat riveted to the lower part of the cope member. lower edge of the cope members are cut away flush with the lower surface of the angle pieces 10 to provide recesses 15 for the accommodation of curved horizontally swinging sand supporting members 16 which are pivotally connected to the angled plates 1% of the cope member by pivot pins 17. The supporting members 16 are curved concentrically with the curve of the cope mem her so that when the supporting members are in operative position the inner edges of said member will extend into the cope memher and beyond the inner face thereof an equal distance circumferentially. Washers 18 are interposed between the supporting members and the angled plate 14; in order to oflset said members a distance equal to the distance the lower surface of said angled plate 14L is offset from the lower surface of the angled reinforcing piece 10 so that said member will clear the reinforcing piece in being swung to an operative position within the cope member. Stop lugs 19 are formed on the sand supporting members near the pivotal connection thereof and these lugs are adapted to strike the shoulder 20 formed by the angled reinforcing piece 10 being offset from the apertured plates let and limit the outward swing of the supporting members. The free ends of the supporting members are provided with bent over portions forming hooks 21 which serve as handles to swing them into and out of operative position and also as a means for supporting the free ends -of the supporting members when the cope member is removed from the drag member. hen the supporting members are swung into operative position within the cope member the bent over portions or hooks pass over the flange of the angled reinforcing piece 10 and support the ends when the cope member is raised from the drag member and the supporting members are assisting in holding the sand within the flask.

Parts of the In using this mold in connection with the slip flask, the cope member is placed on top of the drag member which has been filled with sand and the pattern to be cast embedded therein to the parting line. A coating of parting sand is sprinkled over the other sand and the su porting members swung into operative position and the cope member of the flask is then filled with the molding sand and properly tamped. The cope member with its contained sand is then raised from the drag member and the pattern removed and the cope member replaced on top of the drag member; The supporting members serve to assist in holding the sand while the cope is being moved. As soon as the cope has been replaced on the drag the supporting members are swung outwardly and the whole flask then removed from the sand mold to be again used and the slip flask is then placed on the sand and remains in place until the casting process is completed.

It will be noted that the supporting members are positioned at the parting line of the sand mold thus permitting said members to be swung outwardly without disturbing the molding sand.

While the supporting members are shown in connection with a circular flask it is obvious that they may also be used with a flask of any shape desired.

What I claim as my invention is:

1. A flask for sand molds, comprising a flask member, and a sand supporting member pivotally connected to the flask member and constructed and adapted to be moved horizontally into and out of operative position.

2. A flask for sand molds, comprising a flask member provided with a recessed lower portion, and a sand-supporting member pivotally connected to the flask member and constructed and adapted to be moved hori-' zontally into the recessed portion and into operative position.

3. A flask for sand molds, comprising a circular flask member provided with recessed lower portions, and curved sand supporting members pivotally connected to the flask member and constructed and adapted to be moved into the recessed portions and into operative position.

4. A flask for sand molds, comprising a flask member, and a sand supporting mem ber pivotally connected to the flask member and constructed and adapted to be moved horizontally into the flask member to a position beyond the inner face of said flask member.

5. A flask for sand molds, comprising a flask member provided with recessed lower portions, sand supporting members pivotally connected at their ends to the flask member and constructed and adapted to be swung horizontally into the recesses and project inwardly beyond the inner face of the flask member, and means for limitingthe outward movement of said members.

6. A flask for sand molds, comprising a flask member provided with recessed lower portions, sand supporting members pivotally connected at their ends to the flask member and constructed and adapted to be swung horizontally 'into the recesses and project inwardly beyond the inner face of the flask member, and lugs formed on the supporting members positioned in the plane of a stopping means forming part of the flask to limit the outward movement of the supporting members.

7. A flask for sand molds, comprising a tapering cope member and a drag member formed of reinforced structural flat metal, said cope member being provided withrecessed lower portions, means for holding the two members together in alined position, sand supporting members pivotally connected at their ends to the cope member and positioned to be swung horizontally into the recesses and project inwardly beyond the inner face of the cope member, and lugs formed on the supporting members positioned in the plane of stopplng means forming part of the flask to limit the outward movement of the supporting members.

8. A flask for sand molds, comprising a flask member, a sand supporting member pivotally connected at one end to the flask and constructed and adapted to be swung horizontally into the flask member and project inwardly beyond the inner face of the flask member, and means for connecting the opposite end of the supporting member to the flask member.

'9. A flask for sand molds, comprising a flask member, a sand supporting member pivotally connected at one end to the flask and constructed and adapted to be swung horizontally into the flask member and project inwardly beyond the inner face of the flask member, and a hook formed on the end of the supporting member for connecting the end of the member opposite to its pivotal connection to the flask member.

In testimony whereof, I affix my signature, in presence of two witnesses.

JAMES D. MILLAR.

Witnesses:

C. H. KEENEY, ANNA F. SOHMIDTBAUER. 

